Herbal yield, nutritive composition, phenolic contents and antioxidant activity of purslane (Portulaca oleracea L.) grown in different soilless media in a closed system

Phytochemical Composition and Antioxidant Activity of Portulaca oleracea: Influence of the Steaming Cooking Process

“…In accordance with HPLC-MS results, the raw extract possessed a higher concentration of phenolic content (57 mg GAE/g DE) than the steamed extract (33 mg GAE/g DE), showing a statistically significant difference between their values. In previous literature, total bioactive components for raw Portulaca oleracea have been reported, with maximum values between 3.6 and 13.4 mg GAE/g DE [ 14 , 18 , 25 , 26 , 27 ]. In a previous work comparing the raw, boiled, and blanched P. oleracea , it was observed that the raw sample had a higher TPC value (23 mg GAE/g DE) compared to the values of the cooked samples (boiled 19 mg GAE/ g DE and blanched 10 mg GAE/g DE) [ 23 ].…”

“…Several reports on raw Portulaca oleracea have been made about its phenolic composition, total phenolic, and total flavonoid contents. Compounds such as caffeic acid, ferulic acid, kaempferol, quercetin, and rutin have been previously identified [ 10 , 11 , 12 , 13 , 14 , 16 , 17 , 18 ]. This plant also shows a class of alkaloids, which are secondary metabolites, named cyclo-dopa amides, or oleraceins, are increasing the general interest [ 12 , 13 , 19 ].…”

Wild and Cultivated Centaurea raphanina subsp. mixta: A Valuable Source of Bioactive Compounds

“…Papafilippaki and Nikolaidis [36] carried out a comparative study between two wild (coastal and mountainous) and one cultivated population of Cichorium spinosum L. under the same growing conditions and reported a great variation in biomass production, mineral composition, arbuscular mycorrhizal colonization rate and biomass production, as well as a significant phenotypic variation among the studied genotypes. In the same context, Alu'datt et al [37] compared nutritional value, phenolic compounds content and antioxidant activity of wild, cultivated (soil and soilless cultivation) and obtained from the market purslane (Portulaca oleracea L.) leaves and suggested that soilless cultivation or the use of growth substrates such as tuff, peat moss, perlite and zeolitic tuff may increase nutritional quality and bioactive compounds content of the final product. Despite the increasing number of reports for the bioactivities and health benefits of wild edible plants [27][28][29][30], more studies are needed to reveal the impact of cultivation practices on tended plants before suggesting their introduction to commercial cultivation.…”

Chemical Composition and Plant Growth of Centaurea raphanina subsp. mixta Plants Cultivated under Saline Conditions

“…The ability of wild species to resist or tolerate stressful conditions suggests they could be used as alternative farming options in soils and climates where conventional species are difficult or impractical to be grown; for the same reason, these species can become an option for small-scale farming allowing the farmers to be competitive within the rapidly changing global market and market needs for novel foods [5][6][7][8][9][10]. Until recently, many reports have highlighted the importance of growing conditions and cultivation practices for producing wild edible greens, focusing on the domestication of these species, their incorporation in sustainable cultivation systems and the rational use of natural resources [2,[11][12][13][14][15]. Moreover, several efforts have been made to emphasize the health benefits resulting from the inclusion of these species in modern diets, since they usually contain numerous bioactive secondary metabolites associated with positive health effects [16][17][18][19].…”